You've all been immunized for Hepatitis B, would you be happy to hear that that's where your Hepatitis B vaccine came from?

你们都对乙型肝炎具有免疫力了,如果你知道你的乙型肝炎疫苗,是从何而来的话,你还会高兴的起来吗

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请在twitter网站上加入我们，网址是，您可以发送评论，相关内容的链接，以及邀请嘉宾的建议，我们期待听到您的声音，we’

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